A ventilator is an important piece of medical equipment used to treat a variety of respiratory conditions such as respiratory failure and sleep apnea. The cost of using a ventilator varies depending on a number of factors, including the severity of the condition, the duration of treatment, the use of the equipment, and the need for care. In some cases, the cost of using a ventilator can be higher. For example, for patients who require prolonged ventilator therapy, the cost can reach more than $10,000 a day. In addition, the cost is also higher when the ventilator equipment used is more advanced or when special care is required. Therefore, more than 10,000 a day for a ventilator is considered normal.